docs: add comprehensive mechanics documentation for all Jupiter products

[genevaprojects]

This commit adds detailed technical mechanics documentation across all major Jupiter products and marketplaces:

1. Ultra Swap (docs/ultra/mechanics.mdx)

   • Juno Liquidity Engine routing and route selection
   • Real-Time Slippage Estimator (RTSE) algorithm
   • MEV protection layers and Jito bundle mechanics
   • Multi-RPC transaction sending strategy
   • Gasless mechanisms (Jupiter Z RFQ and gasless support)
   • Performance optimizations and caching

2. Ultra Swap - Close Authority (docs/ultra/close-authority.mdx)

   • Completed WIP file with full implementation details
   • Token account close authority mechanics for payer parameter
   • Rent reclamation strategies and best practices
   • Code examples in TypeScript and Python

3. Trigger API (docs/trigger/mechanics.mdx)

   • Limit order lifecycle and execution flow
   • Price monitoring system and algorithms
   • Order state management and transitions
   • Fee structure and priority execution
   • Performance characteristics and latency metrics

4. Recurring API (docs/recurring/mechanics.mdx)

   • Time-based vs price-based order mechanics
   • DCA execution scheduling and timing precision
   • Automated debt ceiling for withdrawals
   • Price boundary mechanics and skip behavior
   • Escrow management and fund custody

5. Lend Protocol (docs/lend/mechanics.mdx)

   • Unified liquidity layer architecture
   • Interest rate curves and accrual mechanics
   • Earn protocol deposit/withdrawal flows
   • Borrow vault system with up to 95% LTV
   • Liquidation mechanics including Dutch auctions
   • Oracle system and risk management

6. Studio (docs/studio/mechanics.mdx)

   • Bonding curve types and formulas
   • Token lifecycle from creation to graduation
   • LP creation and fee distribution (50% to creator)
   • Vesting schedules and release calculations
   • Anti-sniper protection mechanisms
   • Quote mint flexibility

7. Send API (docs/send/mechanics.mdx)

   • Invite code generation and escrow mechanics
   • Self-custodial security model
   • Mobile-only claiming flow in Jupiter Mobile
   • Gasless swap integration for onboarding
   • Expiry and clawback processes
   • Jupiter Mobile Adapter integration

All documentation includes:

• Technical architecture diagrams (ASCII art)
• Code examples and algorithms
• Best practices and integration patterns
• Performance metrics and SLAs
• Security considerations
• Related documentation links

These mechanics sections provide developers with deep technical understanding of how each product works internally, enabling better integration decisions and troubleshooting.

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